TSOP-II 44 To DIP PCB Feedback

[vfxsoup]

Hi,

New to the forum but been a lurker for a little while.

I'm starting a project that will use mostly thru-hole chips and components. There's one SRAM chip that I can't get in DIP form so decided to design a small PCB to convert from TSOP-II 44 to a DIP configuration so that I can prototype with it, either on breadboards or stripboard/veroboard. I also thought it might be a good first PCB to get manufactured by JLCPCB for a couple of dollars.

I feel silly asking as it's so simple but I was wondering if you could critique it, and let me know if I've made any blunders; in particular I've had to use vias to route the traces underneath the board to keep the overall size down. I also took the liberty of putting 0603 bypass caps across the VCC/GND pins for the particular chip (Cypress CY7C1020CV33) to reduce clutter on the breadboard, but these are optional if another TSOP II sized chip needed to be converted at another time.

Images attached - top, bottom and combined from EasyEDA.

Thanks!

[Benta]

Such adapters can be bought off-the-shelf. Why reinvent the wheel?
And your reference to JLCPCB smells...

[sokoloff]

Maybe have a look at other popular TSOP-44 chips and see if there are other common Vcc/GND configurations that you can also offer decoupling cap spot for.

I'd also use the more generous "hand soldered" 0603 footprints (which give more room on the pad to facilitate hand-soldering). The footprints you used look more suitable for solder paste application.

[vfxsoup]

Such adapters can be bought off-the-shelf. Why reinvent the wheel?

You're right; I've found one such adapter (https://www.amazon.com/Proto-Advantage-TSOP-44-DIP-44-Adapter-pitch/dp/B00JU3J7XE) but its footprint is wider than I'd like, and it's expensive to get it shipped over here. Plus my design incorporates the bypass caps.

And your reference to JLCPCB smells...

Not quite sure I understand but if J****B is a rude word around here I'll say it no more 
Thanks.

[vfxsoup]

Maybe have a look at other popular TSOP-44 chips and see if there are other common Vcc/GND configurations that you can also offer decoupling cap spot for.

Good idea, thanks - there's plenty of room on the top side of the board for these.

I'd also use the more generous "hand soldered" 0603 footprints (which give more room on the pad to facilitate hand-soldering). The footprints you used look more suitable for solder paste application.

Yes I did wonder about whether the 0603 might be a bit small for hand soldering. I'll make them wider (the 0805 pads were a bit of a tight squeeze which is why I decided on 0603).

Thanks.

[TimCambridge]

Such adapters can be bought off-the-shelf. Why reinvent the wheel?

You're right; I've found one such adapter (https://www.amazon.com/Proto-Advantage-TSOP-44-DIP-44-Adapter-pitch/dp/B00JU3J7XE) but its footprint is wider than I'd like, and it's expensive to get it shipped over here. Plus my design incorporates the bypass caps.

ebay.co.uk, around £1 to £2 each, next day delivery. There's at least one, could be others tucked away.